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Braden A W Brinkman, Alison I Weber, Fred Rieke, Eric Shea-Brown
Neural circuits reliably encode and transmit signals despite the presence of noise at multiple stages of processing. The efficient coding hypothesis, a guiding principle in computational neuroscience, suggests that a neuron or population of neurons allocates its limited range of responses as efficiently as possible to best encode inputs while mitigating the effects of noise. Previous work on this question relies on specific assumptions about where noise enters a circuit, limiting the generality of the resulting conclusions...
October 2016: PLoS Computational Biology
E S Tikhonov, D V Shovkun, M Snelder, M P Stehno, Y Huang, M S Golden, A A Golubov, A Brinkman, V S Khrapai
We investigate transport and shot noise in lateral normal-metal-3D topological-insulator-superconductor contacts, where the 3D topological insulator (TI) is based on Bi. In the normal state, the devices are in the elastic diffusive transport regime, as demonstrated by a nearly universal value of the shot noise Fano factor F_{N}≈1/3 in magnetic field and in a reference normal-metal contact. In the absence of magnetic field, we identify the Andreev reflection (AR) regime, which gives rise to the effective charge doubling in shot noise measurements...
September 30, 2016: Physical Review Letters
Lixia Fan, Shaopeng Pei, X Lucas Lu, Liyun Wang
The transport of fluid, nutrients, and signaling molecules in the bone lacunar-canalicular system (LCS) is critical for osteocyte survival and function. We have applied the fluorescence recovery after photobleaching (FRAP) approach to quantify load-induced fluid and solute transport in the LCS in situ, but the measurements were limited to cortical regions 30-50 μm underneath the periosteum due to the constrains of laser penetration. With this work, we aimed to expand our understanding of load-induced fluid and solute transport in both trabecular and cortical bone using a multiscaled image-based finite element analysis (FEA) approach...
2016: Bone Research
Jenna B Gillen, Jorn Trommelen, Floris C Wardenaar, Naomi Y J Brinkmans, Joline J Versteegen, Kristin L Jonvik, Christoph Kapp, Jeanne de Vries, Joost J G C van den Borne, Martin J Gibala, Luc J C van Loon
Dietary protein intake should be optimized in all athletes to ensure proper recovery and enhance the skeletal muscle adaptive response to exercise training. In addition to total protein intake, the use of specific protein-containing food sources and the distribution of protein throughout the day are relevant for optimizing protein intake in athletes. In the present study, we examined the daily intake and distribution of various protein-containing food sources in a large cohort of strength, endurance and team-sport athletes...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
Zeeshan Khan, Rehan Ali Shah, Saeed Islam, Bilal Jan, Muhammad Imran, Farisa Tahir
Modern optical fibers require double-layer coating on the glass fiber to provide protection from signal attenuation and mechanical damage. The most important plastic resins used in wires and optical fibers are plastic polyvinyl chloride (PVC) and low-high density polyethylene (LDPE/HDPE), nylon and Polysulfone. In this paper, double-layer optical fiber coating is performed using melt polymer satisfying PTT fluid model in a pressure type die using wet-on-wet coating process. The assumption of fully developed flow of Phan-Thien-Tanner (PTT) fluid model, two-layer liquid flows of an immiscible fluid is modeled in an annular die, where the fiber is dragged at a higher speed...
October 6, 2016: Scientific Reports
Hyoshin Kim, Juyun Lim, Stephanie S Buehler, Marielle C Brinkman, Nathan M Johnson, Laura Wilson, Kandice S Cross, Pamela I Clark
OBJECTIVE: To examine the extent to which the perception of sweet and other flavours is associated with liking and disliking of flavoured electronic cigarettes (e-cigarettes). METHODS: 31 participants (13 females/18 males; 12 sole/19 dual users) vaped 6 commercially available flavours of blu Tanks: Classic Tobacco (CT), Magnificent Menthol (MM), Cherry Crush (CC), Vivid Vanilla (VV), Piña Colada (PC) and Peach Schnapps (PS); all 'medium' strength, 12 mg/mL nicotine concentration...
October 5, 2016: Tobacco Control
Erik R Coats, Benjamin S Watson, Cynthia K Brinkman
Polyhydroxyalkanoates (PHAs) are biodegradable polymers that can substitute for petroleum-based plastics in a variety of applications. One avenue to commercial PHA production involves coupling waste-based synthesis with the use of mixed microbial consortia (MMC). In this regard, production requires maximizing the enrichment of a MMC capable of feast-famine PHA synthesis, with the metabolic response induced through imposition of aerobic-dynamic feeding (ADF) conditions. However, the concept of PHA production in complex matrices remains unrefined; process operational improvements are needed, along with an enhanced understanding of the MMC...
September 21, 2016: Water Research
Mark de Boer, Guido van den Berk, Natasja van Holten, Josephine Oryszczyn, Willemien Dorama, Daoud Ait Moha, Kees Brinkman
OBJECTIVE: Dolutegravir (DGV) is one of the preferred antiretroviral agents in first line cART. Though considered a well-tolerated drug, we aimed to determine the actual rate, timing, and detailed motivation of stopping DGV in a real life clinical setting. DESIGN: a cohort study including all patients that started DGV in two HIV treatment centers in the Netherlands. METHODS: All cART-naïve and cART-experienced patients who had started DGV were identified from the institutional HIV-databases...
September 24, 2016: AIDS
Lucien W Gassie, James D Englehardt, Jian Wang, Nichole Brinkman, Jay Garland, Piero Gardinali, Tianjiao Guo
Net-zero water (NZW) systems, or water management systems achieving high recycling rates and low residuals generation so as to avoid water import and export, can also conserve energy used to heat and convey water, while economically restoring local eco-hydrology. However, design and operating experience are extremely limited. The objective of this paper is to present the results of the second phase of operation of an advanced oxidation-based NZW pilot system designed, constructed, and operated for a period of two years, serving an occupied four-person apartment...
November 15, 2016: Water Research
Marcel Smid, F Germán Rodríguez-González, Anieta M Sieuwerts, Roberto Salgado, Wendy J C Prager-Van der Smissen, Michelle van der Vlugt-Daane, Anne van Galen, Serena Nik-Zainal, Johan Staaf, Arie B Brinkman, Marc J van de Vijver, Andrea L Richardson, Aquila Fatima, Kim Berentsen, Adam Butler, Sancha Martin, Helen R Davies, Reno Debets, Marion E Meijer-Van Gelder, Carolien H M van Deurzen, Gaëtan MacGrogan, Gert G G M Van den Eynden, Colin Purdie, Alastair M Thompson, Carlos Caldas, Paul N Span, Peter T Simpson, Sunil R Lakhani, Steven Van Laere, Christine Desmedt, Markus Ringnér, Stefania Tommasi, Jorunn Eyford, Annegien Broeks, Anne Vincent-Salomon, P Andrew Futreal, Stian Knappskog, Tari King, Gilles Thomas, Alain Viari, Anita Langerød, Anne-Lise Børresen-Dale, Ewan Birney, Hendrik G Stunnenberg, Mike Stratton, John A Foekens, John W M Martens
A recent comprehensive whole genome analysis of a large breast cancer cohort was used to link known and novel drivers and substitution signatures to the transcriptome of 266 cases. Here, we validate that subtype-specific aberrations show concordant expression changes for, for example, TP53, PIK3CA, PTEN, CCND1 and CDH1. We find that CCND3 expression levels do not correlate with amplification, while increased GATA3 expression in mutant GATA3 cancers suggests GATA3 is an oncogene. In luminal cases the total number of substitutions, irrespective of type, associates with cell cycle gene expression and adverse outcome, whereas the number of mutations of signatures 3 and 13 associates with immune-response specific gene expression, increased numbers of tumour-infiltrating lymphocytes and better outcome...
2016: Nature Communications
A Brinkman-Stoppelenburg, M Boddaert, J Douma, A van der Heide
BACKGROUND: Palliative care expert teams in hospitals have positive effects on the quality of life and satisfaction with care of patients with advanced disease. Involvement of these teams in medical care is also associated with substantial cost savings. In the Netherlands, professional standards state that each hospital should have a palliative care team by 2017. We studied the number of hospitals that have a palliative care team and the characteristics of these teams. METHODS: In April 2015, questionnaires were mailed to key palliative care professionals in all general, teaching and academic hospitals in the Netherlands...
2016: BMC Health Services Research
Yin Ting Cheung, Noah D Sabin, Wilburn E Reddick, Deepa Bhojwani, Wei Liu, Tara M Brinkman, John O Glass, Scott N Hwang, Deokumar Srivastava, Ching-Hon Pui, Leslie L Robison, Melissa M Hudson, Kevin R Krull
BACKGROUND: Leukoencephalopathy is observed in some children undergoing chemotherapy for acute lymphoblastic leukaemia, although its effects on long-term outcomes is unknown. This study examines the associations between acute leukoencephalopathy and neurobehavioural, neurocognitive, and brain white matter imaging outcomes in long-term survivors of childhood acute lymphoblastic leukaemia treated with chemotherapy without cranial radiation. METHODS: In this longitudinal analysis, we used data of children with acute lymphoblastic leukaemia at St Jude Children's Research Hospital (Memphis, TN, USA) who had been treated between June 1, 2000, and Oct 31, 2010...
October 2016: Lancet Haematology
Jekaterina Gudkina, Anda Brinkmane, Stephen H Abrams, Bennett T Amaechi
AIM: Authors assessed the influence of drinking tea with sugar, level of cariogenic microflora and use of fluoride toothpaste and tablets on caries experience of 6 and 12 year old children in Riga, Latvia. METHODS: 141 six and 164 twelve year old children were examined clinically and with bitewing radiographs to determine their dmft/DMFT and dmfs/DMFS. Children or their parents responded to questionnaire on number teaspoons of sugar (TS) used per cup of tea, number of cups of tea consumed daily, using fluoride or non-fluoride toothpaste (TP), frequency of toothbrushing, using fluoride tablets or not (ft)...
2016: Stomatologija
D J Brinkman, J Tichelaar, T Schutte, S Benemei, Y Böttiger, B Chamontin, T Christiaens, R Likic, R Mačiulaitis, T Marandi, E C Monteiro, P Papaioannidou, Y M Pers, C Pontes, A Raskovic, R Regenthal, E J Sanz, B I Tamba, K Wilson, T P de Vries, M C Richir, M A van Agtmael
European medical students should have acquired adequate prescribing competencies before graduation, but it is not known whether this is the case. In this international multicenter study, we evaluated the essential knowledge, skills, and attitudes in clinical pharmacology and therapeutics (CPT) of final-year medical students across Europe. In a cross-sectional design, 26 medical schools from 17 European countries were asked to administer a standardized assessment and questionnaire to 50 final-year students. Although there were differences between schools, our results show an overall lack of essential prescribing competencies among final-year students in Europe...
September 20, 2016: Clinical Pharmacology and Therapeutics
Raya Brandenburg, Sylvia Brinkman, Nicolette F de Keizer, Jozef Kesecioglu, Jan Meulenbelt, Dylan W de Lange
CONTEXT: Intoxicated patients are frequently admitted from the emergency room to the ICU for observational reasons. The question is whether these admissions are indeed necessary. OBJECTIVE: The aim of this study was to develop a model that predicts the need of ICU treatment (receiving mechanical ventilation and/or vasopressors <24 h of the ICU admission and/or in-hospital mortality). MATERIALS AND METHODS: We performed a retrospective cohort study from a national ICU-registry, including 86 Dutch ICUs...
September 20, 2016: Clinical Toxicology
Frank Haessler, Franziska Gaese, Michael Huss, Christoph Kretschmar, Marc Brinkman, Helmut Peters, Samuel Elstner, Michael Colla, David Pittrow
BACKGROUND: As data on the phenotype, characteristics and management of patients with Fragile X Syndrome (FXS) are limited, we aimed to collect such data in Germany in experienced centres involved in the treatment of such patients. METHODS: EXPLAIN-FXS is a prospective observational (non-interventional) study (registry) performed between April 2013 and January 2016 at 18 sites in Germany. Requirements for patient participation included confirmed diagnosis of FXS by genetic testing (>200 CGG repeats) and written informed consent...
2016: BMC Psychiatry
T Hayat, Bilal Ahmed, F M Abbasi, B Ahmad
BACKGROUND AND OBJECTIVE: Single Walled Carbon Nanotubes (SWCNTs) are the advanced product of nanotechnology having notable mechanical and physical properties. Peristalsis of SWCNTs suspended in water through an asymmetric channel is examined. Such mechanism is studied in the presence of viscous dissipation, velocity slip, mixed convection, temperature jump and heat generation/absorption. METHODS: Mathematical modeling is carried out under the low Reynolds number and long wavelength approximation...
October 2016: Computer Methods and Programs in Biomedicine
K Ramesh
BACKGROUND: Assessment of the fluid flow pattern in a non-pregnant uterus is important for understanding embryo transport in the uterus. Fertilization occurs in the fallopian tube and the embryo enters the uterine cavity within three days of ovulation. In the uterus, the embryo is conveyed by the uterine fluid for another three to four days to a successful implantation site at the upper part of the uterus. The movements of fluid within the uterus may be induced by several mechanisms, but they seem to be dominated by myometrial contractions...
October 2016: Computer Methods and Programs in Biomedicine
Heidi Bjørge, Berit Sæteren, Ingun Dina Ulstein
We examined how caregivers experienced the influence of dementia on their relationships with afflicted family members. Family caregivers (n = 15; 11 women and four men; age 39-92 years) of people with dementia participated in semi-structured interviews. The data were analyzed according to Kvale and Brinkman. The analysis identified one overarching theme, experiences of companionship, and four subthemes, namely experiences of loss and loneliness; role change; communication alteration; and caring considerations and coping resources...
August 30, 2016: Dementia
T P Lyubimova, D V Lyubimov, D T Baydina, E A Kolchanova, K B Tsiberkin
The linear stability of plane-parallel flow of an incompressible viscous fluid over a saturated porous layer is studied to model the instability of water flow in a river over aquatic plants. The saturated porous layer is bounded from below by a rigid plate and the pure fluid layer has a free, undeformable upper boundary. A small inclination of the layers is imposed to simulate the riverbed slope. The layers are inclined at a small angle to the horizon. The problem is studied within two models: the Brinkman model with the boundary conditions by Ochoa-Tapia and Whitaker at the interface, and the Darcy-Forchheimer model with the conditions by Beavers and Joseph...
July 2016: Physical Review. E
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